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Finding the Third Proportional to 15,320 and 31,600

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Solution

The third proportional to 15,320 and 31,600 is: 65,180.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,320 : 31,600 = 31,600 : x
  2. Step 2: Convert to fraction form
    15,320/31,600 = 31,600/x
  3. Step 3: Cross multiply
    15,320x = 31,600 × 31,600
  4. Step 4: Simplify right side
    15,320x = 998,560,000
  5. Step 5: Solve for x
    x = 998,560,000/15,320
  6. Step 6: Final answer
    x = 65,180.16

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.